Re: [Qemu-devel] [PATCH] fix qemu_malloc() error check for size==0

[Jamie Lokier]

Eduardo Habkost wrote:
> Now, _that_ sounds like a really bad idea. realloc(NULL, n) is specified
> to be equivalent to malloc(n).

No it isn't.  You can't make that substitution.

In the case where n == 0, realloc(NULL, n) is guaranteed to not
allocate anything and return NULL, whereas malloc(n) does not
guarantee that and in fact doesn't do that on a lot of implementations.

-- Jamie